Introducing the medium and large grids

…The small grid is the grid that stays the same…whether you're working with a big screen or a little screen.…The medium and large grids however change as the screen gets smaller.…When a screen is large, the screen will display according to the large or…the medium grid syntax, which I'm going to show you here in just a second.…When the screen gets small, the columns will stack…on top of each other in a single column.…The point at which the stacking occurs happens at a wider point…with the large grid and a narrower point with a medium grid.…

And those are called the break points.…Alright, so what I'm going to do here, just to show you how…this works, this is our grid.html file carried over from the last video.…You can always go to the Exercise Files folder and copy over…the most recent version of grid.html if you need to work with that.…I'm just going to go through here, and I'm…going to change these small items here to medium.…And the way I can do that is go to Find, up…here on the top of my Sublime Text Editor, and say Replace.…